I don't know what to do for the last 2 boxes. can someone help asap please? Im lots of points, and thank yous, and brailiest answers, I just need the correct answers asap. thank you

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

Maria solved an equation as shown below. what is the solution to maria’s equation?